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#1
09-16-2017, 05:37 PM
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My new CTC-15
Got this CTC-15 today for only $32. It had the original tube, but it was replaced because I wanted the rare earth phosphor.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by Celt; 09-16-2017 at 07:47 PM. 
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#2
09-16-2017, 07:30 PM
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Sweet! And inexpensive too!
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Brian USN RET 22YRS (Avionics/Cal) CET-Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit!
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#4
09-17-2017, 01:22 AM
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Finally fired up the CTC-15. Check out that incredible picture!
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by Celt; 09-18-2017 at 09:58 AM.
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#7
09-17-2017, 12:01 PM
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Great find. As you're probably already aware, the two ground stakes on the far right end of the chroma board exist in two states: either cracked or gonna crack soon. They need to be re-flowed as a matter of course on every CTC-12, '15, '16, '17 and '25.
When they fail, the heaters on the 6GU7s go out, causing the plate voltage to rise. Since the plates are DC-coupled to the CRT grids, this makes the CRT beam current go nuts, lugging down the HV supply. Pic blooms, loses focus and fades out.
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#10
09-18-2017, 07:45 PM
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Well, I'm fighting my first battle with the CTC-15 already. The CRT keeps randomly loosing filament voltage. I took the back off, inspected the socket and CRT base, and put a drop of Deoxit on the filament pins, and that fixed it. I put the back cover back on, and it's out again.
PROBLEM SOLVED. Had to heat up the CRT pins.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan Last edited by TUD1; 09-18-2017 at 08:36 PM.
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#12
09-19-2017, 12:02 PM
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This is becoming the most problematic TV I've ever owned. I had to fix the CRT filament again last night, and I decided to just leave it away from the wall with the cover off. It was working perfectly fine when I went to bed, and when I got up today, I had no blue, no red, and a whole lotta green. I tried swtching the 6GU7's around, and after that I got no green, and whole lotta purple. So then I go find another 6GU7, and put it in the G-Y/blanker tube socket, and the green was still dead. I'm at a loss.
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"If you wish to make an apple pie from scratch, you must first invent the universe." -Carl Sagan
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#13
09-19-2017, 12:17 PM
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Has the solder ground stakes/traces on the chroma board been reflowed?..If not then you will want to do that.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#15
09-19-2017, 04:51 PM
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Linear Mode
